You don't have to be nasty, but you shouldn't have to bend over backwards for someone else's windfall, either.     

But, I'm more concerned about a way to get a bank to bend on this for us? 

Looking at assigning contracts in the Fort Bend area, but mostly Sugar Land, Missouri City, Fresno, and some parts of Katy.

Old lead bends, rotted galvanized steel, cast iron jam packed with scale build up, valves that don't seat anymore, lead water mains.

Don't bend or crush any of the thin aluminum fins on the front - just wipe it gently to get off any surface crud. 

Don't bend the rules for the renter.

The fix for that is usually shutting off the power at the box on the side of the house where the cable from the A/C connects, hosing it out with a garden hose (use a wide spray nozzle rather than a thin "laser beam" of water, so you don't bend up the fins on the condenser), letting it dry out for a couple of hours, and then turning the power back on. 

Sam,It all comes down to local regulations, zoning...I would be at the City/County planning office first thing and see what's allowed, what the process is...where I live (Bend, Oregon) ADU's are very regulated, but other areas just outside of town are totally different...Good luck...Adam

But it wasn't easy because we have been self employed for over 30 years, owning a retail store in downtown Bend, OR.

Driveway is approximately 125' L x 10' W, no hills, bends, or any significant grade.